That's the pool gate, we have the driveway gates which are the same but wider - 2 of them.

We have drop bolts on the two gates but would like something for the top. The standard D latches are a challenge as the gap between the two gates is a little bit wider than is needed for those. Other latches are a problem as the gate framing isn't very wide - you don't have much space to work with.

What we would really like is the D shaped bit that folds over the top which I think is called a banana latch or a gate bow: